title: 3,3''-Bis(9-hy-droxy-fluoren-9-yl)-1,1':3',1''-terphen-yl.
abstract: The asymmetric unit of the title compound, C44H30O2, contains two independent mol-ecules in which the terminal rings of the terphenyl element are inclined at angles of 36.3 (1) and 22.5 (1)° with respect to the central ring and the dihedral angles between the fluorenyl units are 72.3 (1) and 62.8 (1)°. In the crystal, pairs of O-H⋯O hydrogen bonds link the mol-ecules into inversion dimers. The hy-droxy H atoms not involved in these hydrogen bonds form O-H⋯π inter-actions in which the central terphenyl rings act as acceptors. Weak C-H⋯O contacts and π-π [centroid-centroid distance = 4.088 (2) Å] stacking inter-actions also occur. Taking into account directed non-covalent bonding between the molecules, the crystal is constructed of supramolecular strands extending along the a-axis direction.
authors.affiliation: Department of Chemistry, University of Ioannina, GR-451 10 Ioannina, Greece.
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Skobridis
authors.forename: Vassiliki
authors.initials: V
authors.lastname: Theodorou
authors.forename: Georgios
authors.initials: G
authors.lastname: Paraskevopoulos
authors.forename: Wilhelm
authors.initials: W
authors.lastname: Seichter
authors.forename: Edwin
authors.initials: E
authors.lastname: Weber